"TensorFlow Distributions is widely used in diverse
  applications. It is used by production systems within
  Google and by Google Brain and DeepMind for research
  prototypes. It is the backend for Edward"

  Some docs:
  https://www.tensorflow.org/api_docs/python/tf/distributions
  https://www.tensorflow.org/api_docs/python/tf/distributions/bijectors

Thanks Dustin and the Google team!